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DSSC - Dye Sensitized Solar Cells

2013
This year Juice from Juice at Wildwood has been testing the amount of time needed for a plate to soak in the dye (anthocyanin) and what time gets the highest results.

Here are our measurements of the average efficiency based on time.



Here is one of our group members digital RR books that record our progress overtime.

RR

Here is our first graph measuring different dyes efficiencies
First Graph

Here is our second graph, measuring the soakage time needed for the most efficient plate using our strongest dye so far (anthocyanin)
Second Graph



2012
Current data from Wildwood on different cell types and their efficiencies: DATA
Analyzed data: JuiceFromJuiceFinal.xls
2012 Conference posters:

Pigments tested:

Pigment spectrum	Photo
Chlorophyll a
Chlorophyll b
Xanthophyll
Anthocyanin
Beta-carotene

Our attempt at a giant Xanthophyll DSSC (Roughly 100 square centimeters):

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There does seem to be a slight positive correlation between peak absorption wavelength and efficiency, as well as a negative relationship between molar absorption coefficient and efficiency. However, as the layers of TiO2 increases, the relationship starts to fall apart and the peak absorption spectrum and the molar absorption coefficient becomes less important.

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References

Beta-carotene: absortion spectrum and molar coefitent http://omlc.ogi.edu/spectra/PhotochemCAD/html/041.html
chlorophyll a: absortion spectrum and molar coefitent http://omlc.ogi.edu/spectra/PhotochemCAD/html/123.html
chlorophyll b: absortion spectrum and molar coefitent http://omlc.ogi.edu/spectra/PhotochemCAD/html/125.html
anthocyanin: molar coefitent http://employees.csbsju.edu/SSAUPE/biol327/Lab/photosyn/chlorophyll_quant.htm
anthocyanin: absortion spectrum http://cellbiologyolm.stevegallik.org/anthocyanin/page17
xanthophyll: absortion spectrum and molar coefitent http://www.ocemwo.strony.univ.gda.pl/literatura/Xanthophylls%20Phytoplankton%20pigments.pdf